One prominent principle in UX design is Jakob's Law, named after Jakob Nielsen, a renowned usability expert. Jakob's Law states that "users spend most of their time on other websites and apps, and they prefer your website or app to work the same way as the ones they are already familiar with." In other words, users have pre-existing mental models and expectations based on their experiences with other digital platforms, and they appreciate consistency and familiarity when interacting with new websites or applications.

It's like when a new feature is introduced, companies often follow a cool rule called "Jakob's Law of Familiarity." Basically, it means that users are creatures of habit. We spend most of our time using other websites and apps, and we get used to how things work there.

So, when a company like WhatsApp introduces a new feature, like Stories, they want to make it feel familiar and easy to use. They know that people already understand how Stories work on platforms like Instagram and Facebook. So, instead of reinventing the wheel, they use a similar design pattern. They're like, "Hey, you already know how this works on other apps, so we'll make it work the same way here!"

By doing this, companies make it super easy for us to jump in and start using the new feature without any confusion. It's like speaking the same language or using the same dance moves that everyone already knows. We appreciate that because we don't have to learn something completely new. We can just dive right in and enjoy the experience.

So, next time you see a familiar design pattern in a new feature, remember that it's all about making things cool and effortless for us, the users!